John bbokenshibe



@einen f l aient fitte i JOHN BROKENSHIRE, OF QSWEGO, NEW YORK.

Laie-8 Patent No. 80,905, dem August 11, 1868.

IMPROVEMET Ill PUMPS.

TO ALL WIIOM 1T MAY CONGERN:

Be it known that I, JOHN BROKENSHIRE, of' Oswego, in the countyof Oswego, and State ot` New York, have invented a new anduseful Improvement in Ships Pumps; and I do hereby declare the following' te be' a full, clear, and exact description of, thesame, suiieient to enable others skilled in the artto which my invention appertains to fully understand and use the same, reference being had to the accompanying drawings, which are made a part of this specification, and in which* i Figure 1 is a vertical central section of a pump illustrating my invention.

Figure 2 is a back View thereof. i

Figure 3 is' a front view of, the same. v

Figure 4 is a vertical sectional view of my pump, as modified te suit deep'sea-going vessels,`and

Figure 5 is an elevation of the form shown `in iig. 4. 4

Similar letters of reference indicate corresponding parts inthe several figures.

The subject of this invention is a double-acting pump for pumping water -from vessels. The inventionconsiste chiefly in providing Ja chamber situated between the barrels, which Areceives the elevated water at a point somewhat above the lower stationaryr` valves, so that such water ou its way tothe exit-nozzle shall be compelled to descend in said chamber, in such a. manner as to produce a vacuum around the suction-pipe inthe chamber,

and thus aid the plungers in elevating the water.

In iigs. 1 and 4, AA are thepump-barrels, B B the plungers bearing the up'pervalvcS, and C C the lower stationary valves; -D is the suction-pipe, and E E' e. chamber situated centrally between the'barrels A A,

and inte which the suetion-pipe leads and discharges. The suction-pipe communicates withthe chamber E E, at a point somewhatl above the lower valves O C, as clearly shown in igs. 1, 2, and 4. The suction-pipe D may pass up through the deck and enter the chamber E E vertically, as shown in iig. 1,in which case it is to be secured. to `thc bottom plate ot' the pump by a screw-joint or otherwise. But the pipe D, as arrangedi'n iig. 1,

may be dispensed with, and a hose or-.other 'pipe may be attached' `to the side of the pump, as shown in iig. 2, in order to pump the bilge-water from either side oi' thelves'sel,l or frommidship, at will. To enablefthe ready attachment and detachment of the hose D or otherpipe, a threaded thimblc, T, is inserted in the side of the pump.

G is a partition closing or extending across thechamber E E, at a vpoint somewhat above that at which the pipe D communicates with said chamber E. i The chamber E E communicates at 'bottom withA the two pumpbarrels A A. M is intended to designate the chamber in the upper part-of the pump, through which the water passes on its way to the discharge-nozzle P, (see'gs. 3,'and 5.) The partition has an opening, closedby aplug, H, to enable the vessclto be sounded, and when4 the pum'p is constructed as shown ings. 4 and 5, an opening, O, iig. 5, is formed above deck between the barrelsAA,.an'd beneath the upper chamber or outlet, so as to afford 4ready access to said plug-opening, which is near the deck. In iig. 3, s represents a plug closing an opening through which water is allowed to escape from the pump 'in winter to prevent freezing. It will be observed'that the pump shown in figs. 4 and 5, diiiers from that shown in iig's. 1, 2, and 3,- merely in that it extends below as )voll as above the deck.

Before describing the operation oi'this pump, I will state that when it is of the particular construction indicated in the drawings, it will be preferably of metal, but when made' of wood, Ilrst form an opening in the side oi' the log or piece` of timber, from which the pump is to be made, and then bore the log longitudinally, so as to form the two barrels and an ascending duct or passage, all communicating with said opening in the side,

which is to be afterward closed by a. cover or plate, so as to form 'a chamber of communication bctweenthe barrels and suction-pipe.

Operation. y 4 This boing essentially a suction-pump, the operation, so far as the plungers Vand valves are concerned, need not be explained. It will be observed that before the water can pass into the barrels A-A, (thence to be ejected through chamber M and nozzle PA it must be elevated within the chamber E E, above the valves G C, and then descend, in order to pass through said valves. -Now, as th-e chamber E Ev is-clovsed above the outlet of the pipe i D by the partition G', said chamber forms, in conjunction with the pipe D, a. sort of siphon, inasmuchV as the water, as it descends in chamber E E, leaves a vacuum above, the 'effect of which is to cause the pump to he init measure self-acting, and thus reduce the power required to elevate a given amount of water. Thus the pump may be said to require only the power necessary to discharge its own contents, and the water thus ejected is made available as a means to raise the water from the vessel. The pump is adapted to hold ,its own priming,

that is tosay, to retain the waterwhich it receiveseven though the lower valves should be removed from the pump.' The barrels being in communication, a constant discharge may be maintained, and the consequent steady ow o f the water prevents the pump from being choked with grain, &c. Choking frequently results from momentary stoppages or the intermittent action of pumps, as heretofore constructed.

Having thus described my invention, what I claim as new herein, and desire to secure by Letters Patent, is-

1. The internal chamber E E, in conjunction with the suction-pipe D, as arrengedprelatively with theberrels A A, Plungers B B, valves C C, and discharge-outlet P, substantially as herein. described and for the purpose set forth.v

2. 'In combination with the partsfcf the above, I else claim the opening in the partition G, said opening being in line with the suction-pipeD, as and for' the purpose described.

' JOHN BROKENSHIRE.

Witnesses:

CEAS. l). SMIITH, -JoHN A. WIEDERSBEIM. 

